Tearing Away the Disguise

There are at least five Dwarf Gekko Humanoids (Gekko Mimics) in the game. All five must be destroyed in one continuous run (no saving and quitting). Start with R-02 and continue to R-07. If you've successfully killed all five Gekko mimics (and saved the progress on the first four by completing the missions), the notification appears after the fifth dwarf gekko humanoid is destroyed.

According to the official Metal Gear Database (PlayStation 3), MGS4's requirements to create a mimic were three Dwarf Gekko. This number was reduced by one (to two) likely for the different size/scaling in Metal Gear Rising.

Dwarf Gekko sometimes conglomerate into a roughly humanoid "creature" in some instances. There are at least five (perhaps more) Dwarf Gekko Humanoids in the game. Destroying them may yield a reward.

Ater the fight with the Mastiff and a few Dwarf Gekko's, there is a mimic at the end of the subway tunnel. This mimic will only appear after the fight and upon reaching the door that leads to the surface on your map as a red dot. You don't have to open the door for this mimic to appear but reaching the door will suffice.

This dwarf gekko humanoid is at the bottom of the long staircase after the plaza with the hammer cyborg. For it to appear though, Raiden cannot cause an alert from the Dwarf Gekko sentries or the patrolling Sliders starting from the top of the long stairs. Use a Cardboard Box or Oil Drum Can to sneak by the unmanned gears. Stop moving at the top of the stairs to avoid being detected by the Sliders.

At the very beginning, avoid the main gate of the airbase and check the "eastern-most" spot of the area outside the base perimeter. You can disable the mini-map from turning with your camera in the options, thus creating a sense of north/south, east/west.

After dropping down the first manhole in the sewer (the one without the cut-scene with George), you fight some dwarf gekko clinging to the walls. Before proceeding to the next section of sewers, head back to where you dropped down to; a dwarf gekko humanoid will be loitering there.

Do not cause any alerts in the darkened subway tunnel (stealth kill all the enemies). Near the end of the subway tunnel, do not climb onto the station platform to exit. Instead, go to the end of the trackbed and there is a dwarf gekko humanoid waiting to be destroyed.

Raiden requires a subweapon (like the RPG) to destroy this Dwarf Gekko Humanoid. On a balcony across a chasm just before you fight Sundowner in R-04; the balcony is 90° to your left as you exit the World Marshal Building and onto the walkway to the helipad.

This dwarf gekko humanoid is at the bottom of the long staircase after the plaza with the hammer cyborg. For it to appear though, Raiden cannot cause an alert from the Dwarf Gekko sentries or the patrolling Sliders starting from the top of the long stairs.

Use a Cardboard Box or Oil Drum Can to sneak by the unmanned gears. Stop moving at the top of the stairs to avoid being detected by the Sliders or other Dwarf Gekko.

Do not cause any alerts. "Lock" your mini-map (disable "map turns with camera" mode in the options) and check the eastern most spot of the map outside the base's entrance. The dwarf gekko humanoid is lurking amongst the rocks. Note if you do cause an alert - or destroy all the guards at the entrance - the Gekko mimic will not appear.